mustafasrepo commented on code in PR #6501:
URL: https://github.com/apache/arrow-datafusion/pull/6501#discussion_r1214940147


##########
datafusion/physical-expr/src/equivalence.rs:
##########
@@ -34,14 +32,14 @@ use std::sync::Arc;
 /// This is used to represent both:
 ///
 /// 1. Equality conditions (like `A=B`), when `T` = [`Column`]
-/// 2. Ordering (like `A ASC = B ASC`), when `T` = [`OrderedColumn`]
+/// 2. Ordering (like `A ASC = B ASC`), when `T` = [`PhysicalSortExpr`]
 #[derive(Debug, Clone)]
 pub struct EquivalenceProperties<T = Column> {

Review Comment:
   Yes, we can hopefully replace `Column` with `Arc<dyn PhysicalExpr>` in 
subsequent PRs.



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